Coupling



p 1943 D. H. FEENSTRA 30,039

COUPLING Filed June 2, 1942 Inventor": Douwe H. F'eenstr'a,

His Attorney;

Patented Se t. 21, 1943 7 "commie-3.3

' 'ii'buwejii. mama-r ined; Mass: 55;.

General Electric Co New York v My invention relates to a coupling fonjoi-nirrg An object of my invention is to provide 'an im proved couplingarrangement for joining endsfof metallic members; s

Another object of my ,finvent-ion is to provide an improvedhermeticall-y sealed joint between ends of pipe members: I A further object of :myinvention is to provide an improved coupling arrangement for adjacent ends of pipes which; couplirrg arrangement may be quickly-fabricatedor/removed; HA still-further? object 'of my invention is to. provide-an improved arrangement for brazing adjacent ends-of pipes to provide an hermetically sealed joint which will minimize the possibility .of any of the brazingmetal' from ent'ering the pipe passage. v x

Further. objectsandv advantages of my invention Willi-becomeapparent from the .iollowing description referring to the" accompanying drawingpa'nd the features of novelty which characterize my invention will be pointed out with particularity the-claims? annexed toand forming apart of, thisfspeeificationa i y In the drawin g -Figail side view -of a metallic strip which: is; 'em'ployedin my-couplin'g .arrangenient; Fig; 21 is'a'i sectional; side elevation s of ends of pipes j'oin'ed together with my proved: coupling arrangement; is: a side view of the coupling arrangement illustrated in Fig.2} and Fig. 4" is a side new of 'a modification "oi th'c'oupling 'arrangerrrent'illustratedin Fig. 3. It is "custdmaryto :j'o'irr adjacent 'endsof metallic 'pi'p'e's providing asleevewhich'telescopes theends 'of the pipes and then suitably sealing the adjacent surfaces of the sleeve and pipes in any suitable manner suchas by brazing. CIe'arar'fc'es' with" such "a conventional structure are, therefore, required between the pipes for sir ping-ene sleeve over-the enas or the pipes, and it is ns'iran neessary fi have the pipes alignneatsb-ehaemesieev may H p pipe ends. It is some lines desirable; However, to providea tight coupling between adjacent en'ds'of pipes-wees the'pipes are not only out of alignment but when the pipes cannot be adjusted relative to each other for the application of the conventional sleeve member. In the arrangements illustrated in the drawing I have disclosed an improved arrangement for coupling or joining the adjacent ends of pipes which need or attached (015. as" V a not be infal'igmnen andwhich coupling-may be -a pl ed:w th lztf v ne t e ends of the '.-p i s :;r 1ative:to achf then .-;I. .s oibje und s ood, however that my'invention may alsoybe applied '5 as a. -coupl'ing- -1 ior joining the ends of any other suitableimetaliic members I My improved pipe csmpl-ing emanate;- V

cludes a strip ofpsuitable (metallic material 10, such as copper whichymay bemeasilyiwrapped 10 around the adjacent Y ends of meta-lliomembers,

as pi e'members H andgl r; The strip: to

shouicl' have ag suitable widthxso that it may span the. distance.Between the ends oifthe pipes and overlap'thenehds-a sufficient distance; as-is{,-i-l lustrated in Figa2t ,The stripjmateriai in; may also be of -slifiicieriti'length so" that; anumber of layers or turns 'hfjwrapped niaterial mayfbe, prd zvi'ded. It is to 'be: nnderstood howeven; thatan-y' r'suit'able number of turns may benplaced v around the adjacent eri'dsr 'ofthe metallic mem-bers to 'be I joined-together. The n'd-a'of thestrip which provides the outer; turn mayhave .anyisuitabl-shape such as'being' tapered atone si'de; asiillustrated g; and this end +3 may be tacked to the a'da' acent surface of the" next succeeding turn-in any 5 suitable manner such as by'braziirg'; as 'is:illdstratedaat Hi. The adjacent surfaces the i'ii'n'e In m'aI besuitably vide a fluid tight i 'se ateompushea any-suitable tnends of exit surfaceof the pipes 6f the strip material" F0 mately .007 of an inch. By brazing the adjacent turns together and. further by brazing the inner turns to the surface of the metallic members such as the pipes II and I2, and further by of the pipe members II and Wand joining arrangements-mien:

brazing the ends of the turns to each other and to the surface of the pipes at IS an hermetically sealed construction is provided.

It is sometimes desirable to provide an hermetically sealed construction between pipes which must not be contaminated in any manner by the brazing alloy. Thus, in making joints between pipes which provide a passage for an insulating fluid which is employed in a high voltage electric apparatus, the entrance of any of the brazing alloy into the interior of the pipes will contaminate and seriously affect the dielectric strength of the insulating fluid which is to be carried by the pipes. In order, therefore, to minimize the possibility of entrance of any of the meltable material which is used to form the joint, I space the inner turn l8 which spans between the adjacent ends of the pipes II and I2 a suitable distance from the pipe surfaces so that the meltable metal which is used in the joining operation cannot flow between the adjacent surfaces of the turn l8 and the pipes II and I2 by capillary action. Thus, metallic portions l9 are V strip for spacing the inner turn from the surface of the pipes a distance about equal to the thickness of the metal strip so as to minimize the flow of said brazin alloy along the surface provided so as to provide'a space 20 between the turn I8 and thepipe surfaces which space will be sufficiently large-so-that there will be no -capillary action to move the metal to the ends .of the pipes and into the passages thereof; The arrangement 19 maybe accomplished in any suitable manner, such as by providing a cutout portion 2| at the end of the strip Illwhich forms the-inner portion when it is wrapped as shown in Fig. 2. 'The remaining portions therefore provide tongues l9 which will have suflicient length so as tobe equal to the. distance around the periphery of the pipe. The width of the slot -2l' will also be sufficient'so that the tongues. l9 will be spaced from the adjacent edges of the ipipes which .are to be joined together. Thus when employing a stripmaterial which has a '4 thickness of about .03 of an inch, the space 20 will thereby have a width of -the same distance, which distance is sufiiciently great so as to Jminimize any movement of the meltable metallic .material through the space. .20 by capillary action. .Thus the possibility of contaminating :the pipe passages by any of the brazing. alloy is :minimized.

In Fig. 41 have illustrated a similar joint with .the outer ends having a V. ,-shaped construction 22 which is also attached to the adjacentturn by a brazing operation indicatedby the numeral .'23. a I ...,Although I have shown and described particular embodiments of my invention, I do not desire to belimited to the particular embodiments described, and I intend in the appended claims .to cover all modifications which do notdepart from the spirit and scope of my invention 1V.Zhat I'claim as new and desire to secure by Letters Patent of the United States is; V l 1. In combination, a pair of pipes to be joined, strip of metal having a plurality, of turns wrapped around the adjacent ends. of the pipes, means for joining the adjacent wrappings of the .metallic strip together and to the pipe ends to .provide a substantially fluid tight jointbetween ..the pipes, and means spacing the inner turn from of. the pipe's to the ends thereof and into the pipes.

3. A coupling joining adjacent ends of pipes including a strip of metal having a plurality of turns'wrapped around the adjacent ends of the pipes to be joined, a brazing alloy joining said turnswith the adjacent surface of the pipes,

and means spacing-said turns from the surface of the pipes 'adjaoentthe ends thereof a sufficient amount whereby brazing alloy is prevented from flowing along the surface of the pipes to the ends thereof due to capillary action.

4. A coupling joining adjacent ends of metallic members together including a plurality of layers of metallic strip material bridging between and overlapping the adjacent-ends of the metallic members, means including meltable metal joinin said strip metal to the metallic members, said meltable metal joiningsaid layers together, and means spacing said inner layer which spans the adjacent ends of the metallic members from the surface of the members adjacent the ends thereof a 'suificient amount whereby meltable metal is preventedfrom flowing along the surface of the members to the ends thereof due-to capillary action.

a 5.. Acoupling joining adjacentiends of pipes including a strip of metal having a plurality of turns wrappedtaround the adjacent ends of the H pipes and bridging between and overlapping the 4'5 j -metal: joining said turns to the adjacent surface ends of the pipes; .means including. a meltable of the pipes and joiningsaid layers together, and means spacing'saidinne'r tum which spans the adjacent .endsofithe pipes from the surface of the pipes a sufficient amount so as to prevent flow of said meltable metal along the surface of the pipes tothe interior thereof due to capillary action. l

6.;A'coup1ing. joining adjacent ends of pipes .including a strip of. metal having a plurality of turns wrapped around the adjacentends of the pipes and bridging between and overlapping the ends of the pipes; means, including a meltable -metaljoining said turns to, the adjacent surface ,of;the pipes and'joining said layerstogether, the portion ofsaid strip forming the first turn having a slot widerthannthe distance between theadjacent ends, 0f.,the pipes for spacing the inner turn, which; spansthe adjacent endsof the ,pipes from the pipe surfaces a distance equal to the thick ness of. said strip. i

' DOUWE EF NSTRA. 

